alert-additional-content

<div class="alert alert_success">
  <h4 class="alert_heading">Well done!</h4>
  <p>Aww yeah, you successfully read this important alert message. This example text is going to run a bit longer so that you can see how spacing within an alert works with this kind of content.	   </p>
  <hr>
  <p>Whenever you need to, be sure to use margin utilities to keep things nice and tidy.</p>
</div>